NDLI: Oil whirl rotordynamic instability phenomenon-diagnosis and cure in large induction motor

Content Provider	IEEE Xplore Digital Library
Author	Singhal, S. Mistry, R.
Copyright Year	2009
Description	Author affiliation: Siemens Energy & Automation, 4620 Forest Avenue, Norwood, OH, USA (Singhal, S.; Mistry, R.)
Abstract	Reliable design and operation of rotating machinery is critical to achieve bottom line production goals and financial results in petrochemical, transportation and chemical products processing industries. Of the many factors which may cause failure and or reliability issues in these industries, one of the most frustrating and involving relates to bearing failures or high vibration problems. One of the choices for rotating equipments is oil lubricated journal bearings. Oil film journal bearings are susceptible to large-amplitude, lateral vibrations due to a “self-excited rotordynamic instability” known as oil whirl. During oil whirl the rotor orbits in its bearings at a frequency approximately half the rotor speed. Oil whirl is usually caused by lightly loaded bearings, excessive bearing clearances, weak foundation and/or improper oil viscosity. At the inception of non-synchronous oil whirl the amplitude of rotor motion progressively builds at a frequency of approximately less than half of that of the rotor speed and does not damped out. If left uncontrolled oil whirl may lead to catastrophic bearing failures and equipment damage due to high vibration values. This paper will discuss the cause of oil whirl, its effect, how to detect it and its solution.
Starting Page	1
Ending Page	8
File Size	1121139
Page Count	8
File Format	PDF
ISBN	9781424437986
ISSN	00903507
DOI	10.1109/PCICON.2009.5297142
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Petroleum Rotors Induction motors Fuel processing industries Machinery production industries Frequency Petrochemicals Transportation Chemical products Chemical industry lateral vibrations Oil whirl sleeve bearing induction motor
Content Type	Text
Resource Type	Article
Subject	Fuel Technology Energy Engineering and Power Technology

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